乌兰布和沙漠东北缘典型灌木群落多样性与土壤养分相关性研究

采用野外调查及采样测定的方法，选择 4个物种多样性测度指标，对乌兰布和沙漠东北部典型灌木群落多样性和土壤理化特征以及其相关关系进行了分析，结果表明：驼绒藜群落、霸王群落、四合木群落、油蒿群落的均匀度指数（E）均大于白刺群落，且均与白刺群落差异显著；四合木群落的丰富度指数R最高；Shannon-Wiener多样性指数（H）与Simpson多样性指数（D）变化规律一致，四合木群落>驼绒藜群落>霸王群落>油蒿群落>白刺群落。限制驼绒藜群落多样性的关键是土壤全钾、速效钾、碱解氮和有机质含量，限制霸王群落多样性的关键是土壤有效磷、碱解氮和有机质含量；而限制四合木群落多样性的是土壤全盐量、有效磷、速效钾、碱解氮和有机质含量；限制油蒿群落多样性的是土壤有效磷、碱解氮和有机质含量；限制白刺群落多样性的是土壤全盐量、有效磷和有机质含量。丰富度指数（R）主要受土壤有效磷、有机质含量的影响，均匀度指数（E）、多样性指数（H）、多样性指数（D）主要受土壤有机质含量的影响。

Correlation of Typical Shrub Community Diversity and Soil Nutrient in Northeast Ulanbuh Desert

Using field survey and sampling methods, this paper selected 4 species diversity measuring indexes, and analyzed the typical shrub community diversity, soil nutrient characteristics, and the correlation among them in northeastern Ulanbuh Desert. The results showed that evenness index (E) of Ceratoides latens (J. F. Gmel.) Reveal et Holmgren community, Sarcozygium xanthoxylon Bunge community, Tetraena mongolica Maxim. community and Artemisia ordosica community were greater than that of Nitraria tangutorum Bobr. community, and significant difference was found in all with Nitraria tangutorum Bobr. community. The richness index (R) of Tetraena mongolica Maxim. was the highest. Shannon-Wiener diversity index H and Simpson diversity index (D) was consistent with D variation. Tetraena mongolica Maxim. community>Ceratoides latens (J. F. Gmel.) Reveal et Holmgren community>Sarcozygium xanthoxylon Bunge community>Artemisia ordosica community>Nitraria tangutorum Bobr. community. The key factors limitting the diversity of Ceratoides latens (J. F. Gmel.) Reveal et Holmgren community were the soil contents of total potassium, available potassium, available nitrogen, and organic matter. The key factors limitting the diversity of Sarcozygium xanthoxylon Bunge community were the contents of soil available phosphorus, available nitrogen, and organic matter. The key factors limitting the diversity of Tetraena mongolica Maxim. community were the contents of soil total salt, available phosphorus, available potassium, available nitrogen, organic matter. The key factors limitting the diversity of Artemisia ordosica community were the contents of available phosphorus, available nitrogen, organic matter. The key factors limitting the diversity of Nitraria tangutorum Bobr. community were the contents of soil total salt content, available phosphorus, and organic matter. The richness index （R） was mainly affected by the contents of soil available phosphorus, and organic matter. The evenness index, Shannon-Wiener diversity index (H) and Simpson diversity index (D) were mainly affected by the content of soil organic matter.